PRINCETON, NJ -- Despite the recent drop in the U.S. fertility rate, Americans' attitudes about having children have remained unchanged over the past 23 years. More than nine in 10 adults say they already have children, are planning to have children, or wish that they had had children.
Phylum. Starfish belong to the phylum Echinodermata, which is the largest phylum without any members that live on land or in fresh water. Echinoderms have five-point radial symmetry as adults, but are bilaterally symmetrical as larvae. They have an endoskeleton consisting of calcareous plates that often include spines.upiterimages/Photos.com/Getty Images. Although fish and starfish both belong to the kingdom Animalia -- which is the largest division of taxonomic classification -- starfish lack a spine, and therefore belong to a different phylum than true fish.
Starfish have five or more (in some species) arms that radiate outward from a central body disc. The upper-side of their body can be smooth, bumpy or spiny. The mouth of starfish is located under the central body disc and tube feet line the bottom side of the arms.The tube feet enable the starfish to move using a hydraulic system, also known as a water vascular system. Most starfish are bottom feeders.Starfish are often brightly colored animals.he mouth of starfish is located under the central body disc and tube feet line the bottom side of the arms. The tube feet enable the starfish to move using a hydraulic system, also known as a water vascular system. Most starfish are bottom feeders. Starfish are often brightly colored animals.